Delve into the deepest recesses of the City Beneath in this full-length adventure for the award-winning Heart RPG. Follow the destructive path of the Delving Machine as it tears through rock, blood, bone, space, time, and reality toward a crimson eternity.

Your doomed delvers will find themselves caught between three power-hungry antagonists: arms dealer Ptolemy Bay, aelfir politician Aramos, and the mysterious One Who Waits In Ashes—each vying for control of the Delving Machine to reshape the future. Witness the devastating impact of your own Zenith abilities on the places you journey through, visit Summersisle on the eve of catastrophe, and possibly stand before the Heart itself.

This stunning 144-page campaign features evocative prose by Gareth Ryder-Hanrahan, grotesque full-color illustrations by Sar Cousins, and immersive layout by ENnie award-winning Minerva McJanda.

Inside you'll find:

• A complete narrative campaign guiding delvers from Derelictus to the depths of the Heart
• Three major antagonists with factions you can oppose, join, or betray
• New character Beat sheets linking your fate to the Heart and the Delving Machine
• Dozens of new creatures and NPCs from eccentric Junk Mages to body-snatching insects
• Over 40 unique landmarks filled with resources, fallouts, and plots
• More than 20 new delves forming paths toward the bleeding wound at reality's center
• 35+ detailed full-color illustrations depicting life and death in the Heart